A 48-Year-Old Male Patient Is Diagnosed with Metabolic Syndrome and Is

A 48-year-old male patient is diagnosed with metabolic syndrome and is started on biguanide metformin (Glucophage) .He asks the nurse why he needs this drug.The nurse's best explanation of the purpose of the metformin is that it

A) increases the pancreatic secretion of insulin.
B) decreases glucose production by the liver.
C) increases intestinal absorption of glucose.
D) decreases the pancreatic secretion of insulin.